Dollar Tree, Inc. Common Size Income Statement	12 Months Ended	12 Months Ended	Percentages	Percentages	Percentages
Jan. 28, 2023	Jan. 29, 2022	Jan. 30, 2021	Jan. 28, 2023	Jan. 29, 2022	Jan. 30, 2021
Total revenue	28,331.7	26,321.2	25,509.3
Cost of sales	19,396.3	18,583.9	17,721
Selling, general and administrative expenses	6,699.1	5,925.9	5,900.4
Operating income	2,236.3	1,811.4	1,887.9
Interest expense, net	125.3	178.9	147.3
Other expense, net	0.4	0.3	0.8
Income before income taxes	2,110.6	1,632.2	1,739.8
Provision for income taxes	495.2	304.3	397.9
Net income	$ 1,615.4	$ 1,327.9	$ 1,341.9
a. Review the vertical analysis and provide the two largest expenses for the current year. Explain the trend over the three years for these two expenses and discuss how these costs affects net earnings.
b. Discuss the fluctuations in interest expense. What are reasons that could cause changes in interest expense? You need to provide specific causes for the applicable company that relates specifically to the interest expense.
c. Discuss the fluctuations in income tax expense. What are reasons that could cause changes in income tax expense? You need to provide specific causes for the applicable company that relates specifically to the income tax expense.
d. Was the company more or less profitable when compared to the prior year? Using the specific income statement ratios or amounts, explain what caused the change in income from the prior year.